Pocket-filter.



No. 684,337. Patented Oct. 8, |90I. T. WRIGHT.

vPDCKET FILTER.

(Application led May 31, 1901.)

(Ho Model.) l

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UNITED STATES PATENT OFFICE.

THOMAS VRIGH'I, OF ALLEGHENY, PENNSYLVANIA.

POCKET-FILTER.

srncIFrcA'rIoN farming pare of Letters Patent No. 684,337, dated octobers, 1901.

Application ined May 31, 190i.

To @ZZ whom t may concern:

Beit known that I, THOMAS WRIGHT, a citizen of the United States,residing at Allegheny, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inPocket-Filters; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to lters, and particularly to that class designedfor use in combination with a cup or like vessel.

The object of this invention is to provide a novel filter proper inwhich the filtering agent is of such porosity as to permit the water topass therethrough under the suction applied by the user or, in otherwords, the iiltering agent is of such consistency as to permit of thewater being drawn therethrough by drawing the air from a tube andcreating a vacuum.

Furthermore,the object of this invention is to provide a combineddrinking-cup and casing in which the lter proper is stored fortransportation, and, furthermore, in the provision of novel means forengaging the iilter and preventing its moving in its case.

Furthermore, the object of the invention is to provide means for holdingthe iiltering agent in fixed relation to its shell and at the same timeallowing a space between the outer surface of the ltering agent and itsshelhinto which the water is drawn.

Finally the object of the invention is to produce a combined lter anddrinking-cup which will possess advantages in points of efficiency,simplicity, and inexpensive structure. l

With the above and other objects in view the invention consists in thedetails of construction and in the arrangement and combination of partsto be hereinafter more fully set forth and claimed.

In describing the invention in detail reference will be had to theaccompanying drawings, forming part of this specilicatiomwherein likecharacters denote corresponding parts in the several views, and inwhich-A Figure 1 is a sectional view of the drinking-cup, showing thefilter in elevation. Fig.

Serial No. 62,575. (No model.)

2 is a vertical sectional View of the lter. Fig. 3 is a sectional viewof the filter-casing and a top plan view of the filtering agent. Fig. 4is a view in elevation, partly in section, showing the adaptability ofthe filter in connection with an ordinary cock. Fig. 5 is a fragmentalsectional view embodying a slight modification. 1

In the drawings, 1 indicates the drinkingcup, having a handle 2 and acover 3. The cup serves the double function of inclosing and confiningthe filter for transportation and also holds water to be drawn throughthe filter.

The filter comprises a casing open at one end and provided withscrew-threads a, to which is threaded a retaining-ring 5. The oppositeend is provided with a conical cap 6, terminating in a nipple 7, Awhichhas a preferably flexible pipe 8 and the pipe in turn having amouthpiece 9. The filtering agent 10 within the casing is shaped similarto an inverted U ,with its lower edge bearing against theretaining-ring. The diameter of the filtering agent at the lower edge isjust equal to the diameter of the casing inside, so that sidewisedisplacement thereof will be obviated. The filtering agent tapers towardthe top and its outer surface has ribs 11, which bear against theconical cap to prevent a movement of the filtering agent within thecase. The interstices between the ribs admit of the free passage ofwater to the nipple as a vacuum is created by drawing air from the pipe.

It will be observed that the retaining-ring may bind the ribs againstthe cap, so that the filtering agent is secured against movement in anydirection; yet said filtering agent is readily removed for the purposeof cleansing or renewing by the displacement of the retaining-ring.

As shown in Fig. 4, the lter is inverted, and as a substitute for theretaining-ring I supply a threaded cover 12,having a threaded nipple, bywhich it is connected to the cock 13. A gasket 14 is interposed betweenthe cover and the casing to insure a water-tight joint.

In the construction shown in Fig. 5 I disclose a means for vretainingthe filter in the cup, this comprising a resilient tongue 18, out

roo

y Patent, is-

1. In a filter, a casing, a filtering agent fitting in the casing andhaving ribs bearing against the casing, a ring screwed on the casing forretaining the filtering agent in place and a connection through whichwater is.

drawn from the filter.

2. In a ilter a easing, a filtering agent having ribs on its outerconvexed surface a retaining-ring screwed on the casing and pressing theribs into engagement with the casing substantially as described. Y

3. In a filter, a casing, a filtering agent therein, a drinking-cup toreceive the filter and a latch for retaining the filter in place.Y f Y.

In testimony whereof I affix my signature in presence 0f twowitnesses.

THOMAS VRIGHT.

IVitnesses: Y Y

J. WV. FORDENBACHER, JAMES KEAY.

27o,V formed in the shape of an inverted U and: Y'

